Preliminary
Registers
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20.9.1.6 USBSS IRQ_ENABLE_SET Register (IRQENABLER)
The USB interrupt mask set register (IRQENABLER) allows the USB interrupts to be enabled
(unmasked). A read from this register returns the USB interrupts enabled.
General actions per bit:
Write 0: No action
Write 1: Interrupt enabled
Read 0: Interrupt disabled
Read 1: Interrupt enabled
The USBSS IRQ_ENABLE_SET register is shown in
and described in
Figure 20-27. USBSS IRQ_ENABLE_SET Register (IRQENABLER)
31
16
Reserved
R-0
15
12
11
10
9
8
Reserved
rx_pkt_cmp_1
tx_pkt_cmp_1
rx_pkt_cmp_0
tx_pkt_cmp_0
R-0
R/W-0
R/W-0
R/W-0
R/W-0
7
3
2
1
0
Reserved
pd_cmp_flag
rx_mop_starvati rx_sop_starvati
on
on
R-0
R/W-0
R/W-0
R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 20-37. USBSS IRQ_ENABLE_SET Register (IRQENABLER) Field Descriptions
Bits
Field
Description
31-12
Reserved
Always read as 0. Writes have no effect.
11
rx_pkt_cmp_1
Interrupt enable for USB1 Rx CPPI DMA packet completion status.
10
tx_pkt_cmp_1
Interrupt enable for USB1 Tx CPPI DMA packet completion status.
9
rx_pkt_cmp_0
Interrupt enable for USB0 Rx CPPI DMA packet completion status.
8
tx_pkt_cmp_0
Interrupt enable for USB0 Tx CPPI DMA packet completion status.
7-3
Reserved
Always read as 0. Writes have no effect.
2
pd_cmp_flag
Interrupt enable when the packet is completed and the packet descriptor is pushed into the queue
manager.
1
rx_mop_starvation
Interrupt enable when queue manager cannot allocate an Rx buffer in the middle of a packet.
0
rx_sop_starvation
Interrupt enable when queue manager cannot allocate an Rx buffer at the start of a packet.
1834
Universal Serial Bus (USB)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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